<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
<title></title>
</head>
<body>
<script type="text/javascript">
  function changeLink(){
    document.getElementById('mr').innerHTML="明日网校";
    document.getElementById('mr').href="http://star.mingrisoft.com";
  }
</script>
<a id="mr" href="http://www.mingrisoft.com">明日学院</a>
<input type="button" onclick="changeLink()" value="修改">
</body>
</html>
